It’s time we listened to Floyd Mayweather. He wanted Manny Pacquiao to agree to Olympic-style drug testing if they were to fight. That was more than two years ago, and Mayweather has required it of all his opponents since. Now it’s time for random drug testing to be mandated for every major pay-per-view fight, starting with Nevada and eventually extending to New York and California.

If we have learned anything from the cancellation of the rematch between Lamont Peterson and Amir Khan it’s positive drug tests can cost promoters millions. Peterson, who had won the WBA super lightweight title in a rugged battle with Khan last December, tested positive for a banned substance causing the cancellation of their May 19 rematch in Las Vegas.

Peterson tested positive for a synthetic testosterone in two different urine samples taken on March 19. He claimed he had been treated by a Las Vegas doctor in November with testosterone pellets for having a low testosterone condition, treatments that began before his first fight with Khan in Washington. D.C.

Peterson, however, did not inform VADA (Volunteer Anti-Doping Association), which was overseeing the drug tests, of his condition as required by contract. Only after he tested positive did Peterson’s camp scramble to offer an explanation. Ironically, it was Peterson who insisted on random drug-testing, a request to which Khan complied.

A statement issued by “Team Peterson said: “We will vigorously pursue the truth with regards to this matter and continue to fight to protect this young man’s character, credibility and all he has accomplished. Once all the facts have been reviewed we have no doubt that he will be vindicated.”

What can’t be vindicated are the pre-production costs of the event, which aren’t covered by insurance when a fighter tests positive for a banned substance. It’s why Richard Schaefer, the CEO of Golden Boy Promotions, was livid over not finding out about the positive tests until last week. If given earlier notice, he could have possibly brought in another opponent for Khan.

Now there are two incentives for random drug testing before major fights: to protect the fighters and to protect the promoters’ wallet.

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Marc Ratner vows the UFC will continue its pursuit to have mixed martial arts regulated in New York despite failing to get a vote in the Assembly this year. After a closed-door meeting this week, Speaker Sheldon Silver emerged saying there was not enough support to warrant a vote.

Ratner, the UFC vice president for regulatory affairs, said he was frustrated a vote wasn’t at least taken to determine a tally.

“We felt strongly that if we got the vote, we would get it to pass,” Ratner told The Post. “So far we haven’t been able to get that vote.”

UFC says it will be return to Albany next year.

“We’ll make it a 15-round fight instead of a 12-round fight,” Ratner said. “Eventually, we’ll get them.”

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Broadway Boxing will host its third show of the year on June 14 at the Roseland Ballroom where world-rated contender Thomas Dulome (14-0, 11 KOs) will headline along with undefeated light heavyweight prospect Seanie Monaghan (13-0, 8 KOs) of Long Island. Tickets priced from $125 to $45 are available at the usual outlets.

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HBO’s new boxing series, The Fight Game with Jim Lampley, debuts Saturday night after the tape-delayed viewing of Mayweather’s bout with Miguel Cotto. The cancellation of the Peterson-Khan fight will be among the issues discussed.